package com.sky.service.impl;

import cn.hutool.core.bean.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.val;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class DishServiceimpl implements DishService {
    @Autowired
   private  DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
   @Autowired
   private SetmealDishMapper setmealDishMapper;
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtil.copyProperties( dishDTO,dish);
        dishMapper.inster(dish);
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
           flavors.forEach(dishFlavor -> {
               dishFlavor.setDishId(dishId);
           });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult( page.getTotal(), page.getResult());
    }

/**
 * 批量删除菜品
 * @param ids
 */
@Transactional
    public void deleteBatch(List<Long> ids) {
//菜品是否能够删除 ？是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                //菜品处于起售中
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //是否被套餐关联
    List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0){
            //当前菜品被套餐关联了
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            dishFlavorMapper.deleteByDishId(id);
//        }
        dishMapper.deleteBatch(ids);
        dishFlavorMapper.deleteByDishIds(ids);
        //删除菜品和口味的关联数据
    }

    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //查询菜品数据
        Dish dish = dishMapper.getById(id);
        //查询口味数据
        List<DishFlavor> flavors =dishFlavorMapper.getByDishId(id);
        //组装返回结果
        DishVO dishVO = new DishVO();
        BeanUtil.copyProperties(dish,dishVO);
        dishVO.setFlavors(flavors);
        return  dishVO;
    }
    /**
     * 修改菜品
     * @param dishDTO
     */
    public  void updateWithFlavor(DishDTO dishDTO){
        Dish dish = new Dish();
        BeanUtil.copyProperties(dishDTO,dish);
        //修改菜品表(先删除再更改)
        dishMapper.updatate(dish);
        //删除菜品表中的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //添加新的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }
}
